Suzuki GSF1250 Service Manual page 132

1A-63 Engine General Information and Diagnosis:
Step
2 1) Turn the ignition switch OFF.
2) Check the IAT sensor coupler for loose or poor contacts.
If OK, then check the IAT sensor lead wire continuity.
3) Disconnect the IAT sensor coupler.
4) Disconnect the ECM coupler. Refer to "ECM Removal
and Installation in Section 1C (Page 1C-1)".
5) Insert the needle pointed probes to the lead wire coupler.
6) Check the continuity between the Dg wire "B" and
terminal "27". Also, check the continuity between the B/
Br wire "A" and terminal "29".
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity test (
"A"
(B)
"27"
Is the continuity OK?
Action
)
"B"
"29"
Yes
Connect the ECM
coupler and go to Step
3.
I718H1110168-03
(A)
I718H1110060-03
No
Dg or B/Br wire open.